tatum



(No-Model.)

' C. A. TATUM.

SYRINGE VALVE. N0. 342,478. Patented-May, 1886.

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UNITED STATES PATENT OFFICE.

CHARLES A. TATUM, OF NEV YORK, N. Y., ASSIGNOR TO VHITALIJ, TATUM & CO., OF SAME PLACE.

sYRlNeE-VALVE.

SPECIFICATION forming part of Letters Patent No. 342,478, dated May 25, 1886.

Application filed April 19, 1886. Serial No. 199,3-l. (No model.)

To all whom it may concern:

Be it known that I, CHARLES A. TATUM, a resident of New York city, in the county and State ot' New York,havein vented an Improved 5 Valve Seat for the End of Rubber Tubes, of which the following is a full, clear, and exact descriptionreference being made-to the accompanying drawings, in which- Figure l represents an enlarged sectional io view of the end of a rubber tube containing my improved valveseat. Fig. 2 is a horizontal section on the line c c, Fig. l.

The object of this invention is to provide syringes and other structures employing valves i5 in flexible tubes with elastic ends, that shall constitute the seats or supports for the valves.

The invention substantially consists in the use of an elastic rubber plug screwed or pushed into the metal lining ot' the end of the tube, as

2o hereinafter stated.

In the drawings, the letter A represents an india-rubber tube of the kind used in syringes and analogous structures. This tube is drawn around the metal box B, which iucloses the 25 ball-valve C, and which is arranged to prevent the ball from dropping into the rubber tube.

D is a plug,rnade of soft india-rubber, with a central bore, b, through which the liquid can enter the tube A. This elastic rubber plug D,

3o at its inner portion,is screw-threaded, as at d, and has a shoulder below the screwthread, as at e. It can be screwed or pushed into the metallic socket B, which is threaded to receive it, while its shoulder e bears against the end of that socket, and, if desired, also against the 35 end of the tube A. The ballvalve C ndsits seat on the inner end of the elastic rubber plug D. I ain thus in position to use a ballvalve instead of a spindle-valve, and the said ball-valve will lit the elastic seat even it it .ic should not be turned quite true.

In addition to the advantage which I derive `from the use of this elastic valve-seatwnamely, that of being able to use a ball-valve that is not turned absolutely true-the following 45 advantages also flow from the use of my invention: The projecting end of the syringe or other article carrying the elastic plug D is not apt to break glass or other vessels into which it may be thrown; it is noiseless, and therefore not 5c apt to annoy nervous patients, and it does not present to the liquid into which it is dipped lany deteriorating substance, no metal being 

